var setCookie = function(c_name, value, expiredays) {
        var exdate = new Date()
        exdate.setDate(exdate.getDate() + expiredays)
        document.cookie = c_name
                + "="
                + escape(value)
                + ((expiredays == null) ? "" : ";expires="
                        + exdate.toGMTString())
    }

var getCookie = function(c_name) {
    if (document.cookie.length > 0) {
        c_start = document.cookie.indexOf(c_name + "=")
        if (c_start != -1) {
            c_start = c_start + c_name.length + 1
            c_end = document.cookie.indexOf(";", c_start)
            if (c_end == -1)
                c_end = document.cookie.length
            return unescape(document.cookie.substring(c_start, c_end))
        }
    }
    return ""
}

var checkCookie = function(){
    var username = getCookie('username');
    var purview = getCookie('purview');
    if(username !== ""){
    	if(purview == "1"){
    		leftTreePanel.remove(leftTreePanel.item1);
    		leftTreePanel.remove(leftTreePanel.item3);
    	}
        return username;
    }else{
        window.location = "login.html"; 
    }
}